import { defineStore } from "pinia";
import { computed, ref } from 'vue'
import { useUserStore } from "./userStore";
import { insertCartAPI,findNewCartListAPI,delCartAPI } from "@/apis/cart";
export const useCartStore = defineStore ('cart',()=> {
  const userStore = useUserStore()
  const isLogin = computed(() => userStore.userInfo.token)
  const cartList = ref([])
  //获取最新购物车列表action
  const updateNewList = async () => {
    const res = await findNewCartListAPI()
    cartList.value = res.result
  }
  const addCart = async (goods) => {
    const { skuId,count } = goods
    if(isLogin.value){
      //登录后的逻辑
      await insertCartAPI({ skuId, count })
      updateNewList()
    }else{
      const item = cartList.value.find((item)=>goods.skuId === item.skuId)
        if(item){
          item.count++
        }else{
         cartList.value.push(goods)
        }
      }
    }
  //删除购物车
  const delCart = async (skuId) => {
    if(isLogin.value){
      await delCartAPI([skuId])
      updateNewList()
    }else{
      const idx = cartList.value.findIndex((item) => skuId === item)
      cartList.value.splice(idx,1)
    }
  }

  //清除购物车
  const clearCart = () => {
    cartList.value = []
  }
  //单选功能
  const singleCheck = (skuId,selected) => {
    const item = cartList.value.find((item)=>item.skuId === skuId)
    item.selected = selected
  }
  //全选功能
  const allCheck = (selected) => {
    cartList.value.forEach(item=>item.selected = selected)
  }

  //计算
  const allCount = computed(()=> cartList.value.reduce((a,c) => a+c.count,0))
  const allPrice = computed(()=> cartList.value.reduce((a,c) => a + c.count * c.price,0))
  //已选择的数量
  const selectedCount = computed(()=> cartList.value.filter(item => item.selected).reduce((a,c) => a+c.count,0))
  //选中商品价钱合计
  const selectedPrice = computed(()=> cartList.value.filter(item => item.selected).reduce((a,c) => a+c.count*c.price,0))
  //是否全选
  const isAll = computed(()=> cartList.value.every((item)=>item.selected))
  return {
    cartList,
    allCount,
    allPrice,
    isAll,
    selectedCount,
    selectedPrice,
    addCart,
    delCart,
    clearCart,
    singleCheck,
    allCheck,
    updateNewList
  }
},{
  persist:true,
})
